For number one the answer is Iodine because it is in the same group as fluorine. For number two the answer is Germanium for the same reason. For number three the answer is Aluminum for the same reason.
The answer would be D because is the strongest form of radiation
Ground water keept the ground at a stable level when it is gone the cavern it was in has no support and is at risk of callaps
The answer is A, it breaks down and releases thermal energy.
Answer:
an oscillator consisting of a material point of m = 200g vibrates under the action of an elastic force according to the equation y = 0.2sin (π / 4 • t + π / 16) (m)
calculate the period and frequency of the oscillation
calculate the speed and acceleration
calculate the Total Energy